With respect to 1 kg of liquid water: (a) Initially at 0 °C, it is heated to 100 °C by contact with a heat reservoir at 100 °C. What is the entropy change of the water? Of the heat reservoir? What is ΔStotal? (b) Initially at 0 °C, it is first heated to 50 °C by contact with a heat reservoir at 50 °C and then to 100 °C by contact with a reservoir at 100 °C. What is ΔStotal? (c) Explain how the water might be heated from 0 °C to 100 °C so that ΔStotal = 0.